以下为句子列表：
英文: It was shown by field investigation and lab tests that the types of altered rocks were mostly those of montmorillonitization, and the altered clay mineral was mainly pure montmorillanite, which rendered the altered rock both soft and expansive.
中文: 野外地质调查和室内测试表明：滇藏铁路滇西北段出露的多为蒙脱石化蚀变岩带，蚀变岩的黏土矿物组成绝大多数都是单矿物的蒙脱石，导致该地区的蚀变岩既是强度极低的软岩，又是典型的膨胀岩。
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英文: The useful ore mineral is barite and the gangue minerals are mainly calcite, clay mineral and quartz et al.
中文: 矿石矿物为重晶石，脉石矿物主要有方解石、粘土矿物和石英等。
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英文: This article analyzes the mineralization mechanism of the uranium ore, constructs a series of spectra indexes including the ferric oxide index, the ferrous oxide index, the oxidation index, clay mineral index, brightness index, the green index and the hum
中文: 通过分析铀矿的成矿机理，构建了氧化铁指数、氧化亚铁指数、氧化指数、粘土矿物指数、亮度指数、绿度指数和湿度指数等一系列光谱指数，提取了研究区氧化带、还原带、地下水补给与局部排泄的分布和范围，从而圈定了铀矿成矿的有利区。
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